Video conference system

ABSTRACT

A video conference system including a transmitter device, a first receiver device and a second receiver device is provided. The transmitter device includes a transmitter control unit, a first network interface and a first wireless transmission module. The first receiver device includes a second wireless transmission module, a first receiver input interface and a first receiver video circuit. The second receiver device includes a second network interface and a second receiver video circuit. The first receiver video circuit combines the first video data and the second video data as a first combined video data. The first receiver video circuit transmits the first combined video data to a first display device, and outputs the first combined video data to the transmitter device, which outputs the first combined video data to the second receiver device through the first network interface and the second network interface.

This application claims the benefit of People's Republic of Chinaapplication Serial No. 201911409636.0, filed Dec. 31, 2019, the subjectmatter of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION Field of the Invention

The invention relates in general to a video conference system, and moreparticularly to a video conference system capable of combining videodata.

Description of the Related Art

The video conference systems for wireless presentation currentlyavailable in the market normally include a number of transmitter devicesand a number of receiver devices. Each of the conference participantscan connect a transmitter device to a video output port of his/herinformation processing device, and the receiver devices can respectivelyconnected to: (1) a video input port of a near end display device at thesame location with the transmitter device through wireless network; (2)a video input port of a far end display device at different locationwith the transmitter device through Internet connection. When the firstpresenter wants to play the frame of a computer operated by him/her, thefirst presenter can press a projection button of the transmitter deviceconnected to his/her computer, and the transmitter device will bewirelessly connected to the receiver device, which enables the near enddisplay device and the far end display device to play the image datafrom the first presenter's computer. By the same analogy, when thesecond presenter wants to play the frame of a computer operated byhim/her, the second presenter can press a projection button of thetransmitter device connected to his/her computer, and the near enddisplay device and the far end display device will both play the imagedata from the second presenter's computer through the receiver device.Thus, when many people participate the presentation or the videoconference and the video data for presentation is outputted fromdifferent presenters' computers, unplugging/plugging the video signalline (such as the HDMI signal line) for several times between differentcomputers is necessary, hence the video wire is damaged easily and theinconvenience is produced due to the conference being interrupted.

The kind of video conference system for wireless presentation mainlywirelessly transmits the video data outputted from the personal computerend to a display device and play the video data in the display device,but does not capture the video data of the presenter's face. Therefore,people who participate the video conference at far end through networkcannot see the presenter's facial expression, and will have a lowersense of participation. Besides, even though the entire video conferenceis recorded as meeting minutes, the viewer will be unable to identifywhich presenter or questioner is speaking when the recording of thevideo conference is viewed again in the future. Therefore, it has becomea prominent task for the industries to provide a video conference systemfor wireless presentation capable of combining the following data as onesingle combined video data: (1) the frame content of the presentationfile; (2) the video data of presenter's face during the presentationprocess; (3) the presenter-marked image of the frame content of thepresentation file during the presentation process.

SUMMARY OF THE INVENTION

The invention is directed to a video conference system, and particularlyto a video conference system capable of combining video data.

According to one embodiment of the present invention, a video conferencesystem is provided. The video conference system includes a transmitterdevice, a first receiver device and a second receiver device. Thetransmitter device includes a transmitter control unit, a first networkinterface and a first wireless transmission module. The transmittercontrol unit is coupled to a video output port of an information systemand is configured to receive a first video data from the video outputport. The first network interface is configured to transmit the firstvideo data. The first wireless transmission module is configured totransmit the first video data. The first receiver device includes asecond wireless transmission module, a first receiver input interfaceand a first receiver video circuit. The second wireless transmissionmodule is configured to receive the first video data from the firstwireless transmission module. The first receiver input interface isconfigured to receive a second video data. The first receiver videocircuit is coupled to a first display device. The second receiver deviceincludes a second network interface and a second receiver video circuit.The second network interface is configured to receive the first videodata from the first network interface. The second receiver video circuitis coupled to a second display device. The first receiver video circuitcombines the first video data and the second video data as a firstcombined video data. The first receiver video circuit transmits thefirst combined video data to the first display device. The firstreceiver video circuit outputs the first combined video data to thetransmitter device through the first wireless transmission module andthe second wireless transmission module. The transmitter device outputsthe first combined video data to the second receiver device through thefirst network interface and the second network interface.

According to another embodiment of the present invention, a videoconference system is provided. The video conference system includes atransmitter device, a first receiver device and a second receiverdevice. The transmitter device includes a transmitter control unit, afirst network interface and a first wireless transmission module. Thetransmitter control unit is coupled to a video output port of aninformation system and configured to receive a first video data from thevideo output port. The first network interface is configured to transmitthe first video data. The first wireless transmission module isconfigured to transmit the first video data. The first receiver deviceincludes a second wireless transmission module and a first receivervideo circuit. The second wireless transmission module is configured toreceive the first video data from the first wireless transmissionmodule. The first receiver video circuit is coupled to a first displaydevice. The second receiver device includes a second network interface,a second receiver input interface and a second receiver video circuit.The second network interface is configured to receive the first videodata from the first network interface. The second receiver inputinterface is configured to receive a third video data. The secondreceiver video circuit is coupled to a second display device. The secondreceiver video circuit combines the first video data and the third videodata as a second combined video data. The second receiver video circuittransmits the second combined video data to the second display device,and the second receiver video circuit outputs the second combined videodata to the transmitter device through the first network interface andthe second network interface. The transmitter device outputs the secondcombined video data to the first receiver device through the firstwireless transmission module and the second wireless transmissionmodule.

The above and other aspects of the invention will become betterunderstood with regard to the following detailed description of thepreferred but non-limiting embodiment (s). The following description ismade with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of a video conference system according to afirst embodiment of the present disclosure.

FIG. 2 is a schematic diagram of the appearance of the transmitterdevice of FIG. 1 according to the first embodiment of the presentdisclosure.

FIG. 3 is a schematic diagram of an application scenario according tothe first embodiment of the present disclosure.

FIG. 4 is a block diagram of a video conference system according to asecond embodiment of the present disclosure.

FIG. 5 is a schematic diagram of the appearance of the transmitterdevice of FIG. 4 according to the second embodiment of the presentdisclosure.

FIG. 6A is a schematic diagram of an application scenario according tothe second embodiment of the present disclosure.

FIG. 6B is a schematic diagram of another application scenario accordingto the second embodiment of the present disclosure.

FIG. 7 is a block diagram of a video conference system according to athird embodiment of the present disclosure.

FIG. 8 is a schematic diagram of the appearance of the receiver deviceof FIG. 7 according to the third embodiment of the present disclosure.

FIG. 9 is a schematic diagram of an application scenario of according tothe third embodiment of the present disclosure.

FIG. 10A is a schematic diagram of a displayed frame of a second displaydevice corresponding to a first combined video data according to thethird embodiment of the present disclosure.

FIG. 10B is a schematic diagram of a displayed frame of a first displaydevice corresponding to a second combined video data according to thethird embodiment of the present disclosure.

FIG. 11A is a schematic diagram of a picture-in-picture frame of asecond display device corresponding to a first combined video data and asecond combined video data according to the third embodiment of thepresent disclosure.

FIG. 11B is a schematic diagram of a picture-in-picture frame of a firstdisplay device corresponding to a first combined video data and a secondcombined video data according to the third embodiment of the presentdisclosure.

DETAILED DESCRIPTION OF THE INVENTION

The objects, structures, features and functions of the present inventionare disclosed in embodiments below.

Referring to FIG. 1, a block diagram of a video conference system 100according to a first embodiment of the present disclosure is shown. Thevideo conference system 100 includes a transmitter device 120 and afirst receiver device 140. The transmitter device 120 includes atransmitter control unit 122, a transmitter input interface 124, atransmitter video circuit 126 and a first wireless transmission module128. The transmitter control unit 122 is coupled to a video output port182 of an information system 180 and the transmitter control unit 122receives a first video data Vid1 from the video output port 182. Thetransmitter input interface 124 is coupled to a first video source toreceive a second video data Vid2 from the first video source. Thetransmitter video circuit 126 combines the first video data Vid1 and thesecond video data Vid2 as a combined video data Vid_C. The firstwireless transmission module 128 transmits the combined video data Vid_Cto the first receiver device 140. The first receiver device 140, coupledto the first display device 172, includes a second wireless transmissionmodule 142. The second wireless transmission module 142 receives thecombined video data Vid_C and transmits the combined video data Vid_C tothe first display device 172.

In the present embodiment, the information system 180 is exemplified bya notebook computer, but the embodiment is not limited thereto. In thepresent embodiment, the video output port 182 is exemplified by one ofvideo graphics array (VGA) output port, display port (DP),high-definition multimedia (HDMI) interface port and Type-C USB(Universal Serial Bus) interface port supporting video output function,but the embodiment is not limited thereto. When the video output port182 of the information system 180 is an HDMI video port, the HDMI videoport of the information system 180 reads the extended displayidentification data (EDID) code stored in the transmitter device 120.Only after the HDMI video port determines that the transmitter device120 is a display device complying with the HDMI standards according tothe received EDID code will the video output port 182 start to outputthe first video data Vid1 to the transmitter device 120 through the HDMIvideo port. On the other hand, when the video output port 182 of theinformation system 180 is a Type-C USB connection port, the transmitterdevice 120 is coupled to the Type-C USB connection port of theinformation system 180 through a connection line supporting the Type-CUSB alternative mode.

The first video data Vid1 obtained by a notebook computer whenprocessing a file data (such as Microsoft PowerPoint file) inputted by auser is shown on a display monitor of the notebook computer andoutputted through the video output port 182.

Refer to FIG. 2, a schematic diagram of the appearance of thetransmitter device 120 of FIG. 1 according to the first embodiment ofthe present disclosure is shown. The transmitter device 120 has a videoport connection line 127, a transmitter input interface 124 and a firstnetwork interface 129. To provide necessary power for the operation ofthe transmitter device 120, the transmitter device 120 optionallyincludes an independent external transformer 123 or a USB adaptor powerline coupled to the USB port of the information system 180 to receivethe power. The end of the video port connection line 127 has a videosignal line adaptor (such as one of VGA, display port, HDMI interfaceport and Type-C USB interface port) through which the video portconnection line 127 can be mechanically combined with the video outputport 182 of the information system 180. The transmitter control unit 122can be coupled to the video output port 182 of the information system180 through the video port connection line 127 and receive a first videodata Vid1 from the video output port 182.

In the first embodiment, the transmitter input interface 124 isexemplified by a USB interface port, but the transmitter input interface124 is not limited thereto. As shown in FIG. 1, the USB interface usedas the transmitter input interface 124 can be coupled to a USB interfacecamera 162 with an in-built microphone and receive the second video dataVid2 including image and voice from the USB interface camera 162. Forexample, when the camera 162 captures the image of a presenter's face,the captured second video data Vid2 is the video data of the presenter'sface, which includes the presenter's facial image and the presenter'sspeech during the relevant presentation process. The transmitter videocircuit 126 of the transmitter device 120 combines the first video dataVid1 and the second video data Vid2 as a combined video data Vid_C, andthen outputs the combined video data Vid_C to the first wirelesstransmission module 128. The first wireless transmission module 128transmits the combined video data Vid_C to the second wirelesstransmission module 142 of the first receiver device 140. The secondwireless transmission module 142 receives the combined video data Vid_C,and then transmits the combined video data Vid_C to the first displaydevice 172 coupled to the first receiver device 140.

In the first embodiment, the transmitter device 120 optionally includesa first network interface 129. The transmitter video circuit 126combines the first video data Vid1 and the second video data Vid2 as acombined video data Vid_C and then outputs the combined video data Vid_Cto the first network interface 129. Through the Internet, the firstnetwork interface 129 transmits the combined video data Vid_C to thesecond network interface 152 of the second receiver device 150 at farend, such that the function of remote video conference between thetransmitter device 120 and the second receiver device 150 at far endwhich is located at a distinct location can be achieved. The transmitterdevice 120 can transmit the combined video data Vid_C to the secondreceiver device 150 at far end through the first network interface 129and the second network interface 152.

In the first embodiment, the transmitter input interface 124 isoptionally coupled to the peripheral device and receive the first useroperation data Ipt1 from the peripheral device. In the presentembodiment, the peripheral device is exemplified by the mouse 164, andthe first user operation data Ipt1 is exemplified by the mouse movementdata inputted by the user, but the embodiment is not limited thereto.Other possible embodiments of the peripheral device include handwritingpad, touch pad or other device that can operate the curser trail. Afterthe user operates the mouse 164 to input the curser trail, thetransmitter video circuit 126 combines the first video data Vid1, thesecond video data Vid2 (such as the video data of the presenter's facecaptured by the camera 162) and the first user operation data Ipt1 (suchas the mouse movement data) as a combined video data Vid_C.

In the first embodiment, the transmitter video circuit 126 optionallyincludes a display processor and an audio processing circuit whichrespectively perform the combining operation in the video part and thecombining operation in the audio part for the combined video data Vid_C.The display processor includes a scalar controller whose image combiningcircuit combines at least two of the video part of the first video dataVid1, the video part of the second video data Vid2 and the video part ofthe first user operation data Ipt1 as the video part of the combinedvideo data Vid_C. The audio processing circuit combines the audio partof the first video data Vid1 and the audio part of the second video dataVid2 as the audio part of the combined video data Vid_C. Then, the firstwireless transmission module 128 or the first network interface 129outputs the combined video data Vid_C to the first receiver device 140or the second receiver device 150.

Refer to FIG. 3, which shows an application scenario according to thefirst embodiment of the present disclosure. The scenarios shown in FIG.3 include (1) the first user P1 operates the information system 180 toread a presentation file to generate a first video data Vid1, themonitor of the information system 180 shows a first video data frameVid1′, and the information system 180 outputs the first video data Vid1to the transmitter device 120 through the video output port 182; (2) thetransmitter input interface 124 of the transmitter device 120 isconnected to the camera 162 and the mouse 164, the first user P1operates the mouse 164 to input the mouse movement data, and the camera162 captures the image of the face of the first user P1 to obtain afacial video data of the first user P1 (including the facial image andthe presenter's speech). Under such scenarios, the transmitter videocircuit 126 combines the first video data Vid1, the facial video data ofthe first user P1 and the mouse movement data as a combined video dataVid_C, and then transmits the combined video data Vid_C to the firstreceiver device 140 at near end (such as at the same conference room)through the wireless transmission WL and transmits the combined videodata Vid_C to the second receiver device 150 at far end (such as at adifferent conference room in another building) through the Internettransmission LAN. The first receiver device 140 outputs the combinedvideo data Vid_C to the first display device 172 at near end, and thesecond receiver device 150 outputs the combined video data Vid_C to thesecond display device 174 at far end. As shown in FIG. 3, the displayedframe of the first display device 172 at near end and the displayedframe of the second display device 174 at far end both show the firstvideo data frame Vid1′, the first user facial video frame P1′ and thefirst mouse curser trail Ipt1′. The conference participants at near endand at far end can real-timely understand that the first user P1 isgiving presentation and those who view the recording of the videoconference in the future will also understand that the first user P1 isgiving presentation at this stage of the video conference.

Referring to FIG. 4, a block diagram of a video conference system 200according to a second embodiment of the present disclosure is shown. Thevideo conference system 200 includes a transmitter device 220 and afirst receiver device 240. The transmitter device 220 includes atransmitter control unit 222, a transmitter input interface 224, atransmitter output interface 223 and a first wireless transmissionmodule 228. The transmitter control unit 222 is coupled to a videooutput port 282 of an information system 280 and receives the combinedvideo data Vid_C from the video output port 282. The information system280 has an information system video circuit 286, and obtains a firstvideo data Vid1 when processing a file data Dat1 (such as MicrosoftPowerPoint file) inputted by a user. The transmitter input interface 224is coupled to the transmitter control unit 222 and is coupled to theperipheral device (such as the mouse 264) to receive a first useroperation data Ipt1 from the peripheral device. The transmitter outputinterface 223 is coupled to the information system 280, and thetransmitter output interface 223 transmits the first user operation dataIpt1 to the information system 280. The information system video circuit286 combines the first video data Vid1 and the first user operation dataIpt1 as a combined video data Vid_C. The first wireless transmissionmodule 228 transmits the combined video data Vid_C to the first receiverdevice 240. The first receiver device 240 includes a second wirelesstransmission module 242. The second wireless transmission module 242receives the combined video data Vid_C and transmits the combined videodata Vid_C to the first display device 272.

In the present embodiment, the information system 280 is exemplified bya notebook computer, but the embodiment is not limited thereto. In thepresent embodiment, the video output port 282 is exemplified by one ofVGA output port, display port (DP), high-definition multimedia interface(HDMI) port and Type-C USB interface port supporting video outputfunction that are commonly seen in the market, but the embodiment is notlimited thereto. The first video data Vid1 is obtained by a notebookcomputer when processing a file data Dat1 inputted by a user input. Thefile data Dat1 is shown on a display monitor of the notebook computerand is outputted through the video output port 282.

Referring to FIG. 5, a schematic diagram of the appearance of thetransmitter device 220 of FIG. 4 according to the second embodiment ofthe present disclosure is shown. The transmitter device 220 has a videoport connection line 227, an interface port connection line 225, atransmitter input interface 224 and a first network interface 229. Theend of the video port connection line 227 has a video signal lineadaptor (such as one of VGA, display port, HDMI interface port andType-C USB interface port connector) through which the video portconnection line 227 can be mechanically combined with the video outputport 282 of the information system 280. The transmitter control unit 222can be coupled to the video output port 282 of the information system280 through the video port connection line 227 to receive the combinedvideo data Vid_C from the video output port 282. The end of theinterface port connection line 225 has a data line adaptor (such as theUSB adaptor) through which the interface port connection line 225 can bemechanically combined with the system end input interface 284 of theinformation system 280 to transmit the first user operation data Ipt1.

In the second embodiment, the system end input interface 284 isexemplified by a USB interface and the system end video source isexemplified by a network camera 262 disposed on the monitor of thenotebook computer, but the transmitter input interface 224 is notlimited thereto. The USB interface used as the system end inputinterface 284 can be coupled to a network camera 262 with an in-builtmicrophone, such that the network camera 262 can be used as a system endvideo source. The USB interface used as the system end input interface284 can receive a second video data Vid2 including image and voice fromthe network camera 262. The camera 262 transmits the second video dataVid2 to the information system video circuit 286 through the USBinterface port. For example, when the camera 262 captures the image ofthe presenter's face, the captured second video data Vid2 is the videodata of the presenter's face. The second video data Vid2 includes thepresenter's facial image and the presenter's speech during thepresentation process. The information system video circuit 286 of theinformation system 280 combines the first video data Vid1 and the secondvideo data Vid2 as a combined video data Vid_C, and then outputs thecombined video data Vid_C to the transmitter device 220 through thevideo output port 282. The transmitter device 220 further transmits thecombined video data Vid_C to the first receiver device 240. Lastly, thecombined video data Vid_C is transmitted to the first display device 272coupled to the first receiver device 240.

In the second embodiment, the transmitter device 220 optionally includesa first network interface 229. The transmitter control circuit alsooutputs the combined video data Vid_C to the first network interface229. Through the Internet, the first network interface 229 transmits thecombined video data Vid_C to the second network interface 252 of thesecond receiver device 250 at far end, such that the function of remotevideo conference between the transmitter device 220 and the secondreceiver device 250 at far end which is located at a distinct locationcan be achieved. The transmitter device 220 can transmit the combinedvideo data Vid_C to the second receiver device 250 at far end throughthe first network interface 229 and the second network interface 252.

In the second embodiment, the system end input interface 284 isoptionally coupled to the peripheral device to receive the first useroperation data Ipt1 from the peripheral device. In the presentembodiment, the peripheral device is exemplified by the mouse 264, andthe first user operation data Ipt1 is exemplified by the mouse movementdata inputted by the user, but the embodiment is not limited thereto.Other possible embodiments of the peripheral device include handwritingpad, touch pad or other device that can operate the curser trail. Afterthe user operates the mouse 264 to input the curser trail, theinformation system video circuit 286 combines the first video data Vid1(such as Microsoft Power Point file), the second video data Vid2 (suchas the video data of the presenter's face captured by the camera 262)and the first user operation data Ipt1 (such as the mouse movement data)as a combined video data Vid_C.

In the second embodiment, the information system video circuit 286optionally includes the display processor and the audio processingcircuit which respectively perform the combining operation in the videopart and the combining operation in the audio part for the combinedvideo data Vid_C. The display processor includes a graphic processingunit (GPU) whose image combining circuit combines at least two of thevideo part of the first video data Vid1, the video part of the secondvideo data Vid2 and the video part of the first user operation data Ipt1as the video part of the combined video data Vid_C. The audio processingcircuit combines the audio part of the first video data Vid1 and theaudio part of the second video data Vid2 as the audio part of thecombined video data Vid_C. Then, the combined video data Vid_C isoutputted to the transmitter control unit 222 through the video outputport 282 of the information system 280.

Refer to FIG. 6A and FIG. 6B, which shows two application scenariosaccording to the second embodiment of the present disclosure. Thescenarios of FIG. 6A include (1) the first user P1 operates theinformation system 280 to read a file data Dat1, and the informationsystem processor 288 processes the file data Dat1 (such as MicrosoftPowerPoint file) to generate a first video data Vid1; (2) the camera 262in-built in the information system 280 (such as the network camera 262disposed on the monitor of a notebook computer) captures the image ofthe face of the first user P1 to obtain a facial video data of the firstuser P1; and (3) the mouse 264 is connected to the transmitter inputinterface 224 of the transmitter device 220, and the first user P1operates the mouse 264 to input the mouse movement data. Under suchscenarios, the transmitter output interface 223 firstly transmits themouse movement data to the system end input interface 284 through theinterface port connection line 225, then the information system videocircuit 286 combines the first video data Vid1, the facial video data ofthe first user P1 and the mouse movement data as a combined video dataVid_C. The information system 280 firstly transmits the combined videodata Vid_C to the transmitter device 220 through the video output port282, then the transmitter device 220 transmits the combined video dataVid_C to the first receiver device 240 at near end through the wirelesstransmission WL and transmits the combined video data Vid_C to thesecond receiver device 250 at far end through the Internet transmissionLAN. The first receiver device 240 outputs the combined video data Vid_Cto the first display device 272 at near end, and the second receiverdevice 250 outputs the combined video data Vid_C to the second displaydevice 274 at far end. As shown in FIG. 6A, the displayed frame of thefirst display device 272 at near end and the displayed frame of thesecond display device 274 at far end both show the first video dataframe Vid1′, the first user facial video frame P1′ and the first mousecurser trail Ipt1′.

Similarly, the scenarios of FIG. 6B include (1) the first user P1operates the information system 280 to read a file data Dat1 which isinputted, and the information system processor 288 processes the filedata Dat1 (such as Microsoft PowerPoint file) to generate a first videodata Vid1; (2) the camera 262′ connected to the transmitter inputinterface 224 of the transmitter device 220 to capture the image of theface of the first user P1 to obtain a facial video data of the firstuser P1; and (3) the mouse 264 is connected to the transmitter inputinterface 224 of the transmitter device 220, and the first user P1operates the mouse 264 to input the mouse movement data. Under suchscenarios, the transmitter output interface 223 firstly transmits thefacial video data of the first user P1 and the mouse movement data tothe system end input interface 284 through the interface port connectionline 225, then the information system video circuit 286 combines thefirst video data Vid1, the facial video data of the first user P1 andthe mouse movement data as a combined video data Vid_C. The informationsystem 280 firstly transmits the combined video data Vid_C to thetransmitter device 220 through the video output port 282, then thetransmitter device 220 transmits the combined video data Vid_C to thefirst receiver device 240 at near end through the wireless transmissionWL and transmits the combined video data Vid_C to the second receiverdevice 25 at far end through the Internet transmission LAN. The firstreceiver device 240 outputs the combined video data Vid_C to the firstdisplay device 272 at near end, and the second receiver device 250outputs the combined video data Vid_C to the second display device 274at far end. As shown in FIG. 6B, the displayed frame of the firstdisplay device 272 at near end and the displayed frame of the seconddisplay device 274 at far end both show the first video data frameVid1′, the first user facial video frame P1′ and the first mouse cursertrail Ipt1′.

Referring to FIG. 7, a block diagram of a video conference system 300according to a third embodiment of the present disclosure is shown. Thevideo conference system 300 includes a transmitter device 320 and afirst receiver device 340. The transmitter device 320 includes atransmitter control unit 322, a first network interface 329 and a firstwireless transmission module 328. The transmitter control unit 322 iscoupled to the video output port 382 of the information system 380 toreceive a first video data Vid1 from the video output port 382. Thefirst wireless transmission module 328 transmits the first video dataVid1 to the first receiver device 340. The first network interface 329can communicate with the second network interface 352 of the secondreceiver device 350 at far end through the Internet transmission LAN. Bydoing so, the transmitter device 320 can output the first video dataVid1 to the second receiver device 350 at far end through the firstnetwork interface 329 and the second network interface 352, such thatthe function of remote video conference between the transmitter device320 and the second receiver device 350 at far end which is located at adistinct location can be achieved.

The first receiver device 340 includes a second wireless transmissionmodule 342, a first receiver input interface 344 and a first receivervideo circuit 346. The second wireless transmission module 342 is usedto establish wireless transmission WL with the first wirelesstransmission module 328. In the third embodiment, the first receiverinput interface 344 is exemplified by a USB interface, but the firstreceiver input interface 344 is not limited thereto. As shown in FIG. 7,the USB interface used as the first receiver input interface 344 can becoupled to a USB interface camera 366 with an in-built microphone toreceive a second video data Vid2 including image and voice from the USBinterface camera 366. For example, when the camera 366 captures theimage of the face of the third user P3, the captured second video dataVid2 is the facial video data of the third user P3. The second videodata Vid2 includes the facial image and the speech of the third user P3during the presentation process.

In the third embodiment, the first receiver input interface 344 isoptionally coupled to the peripheral device to receive the first useroperation data Ipt1 of the third user from the peripheral device. In thepresent embodiment, the peripheral device is exemplified by the mouse367 and the first user operation data Ipt1 is exemplified by the mousemovement data inputted by the user, but the embodiment is not limitedthereto. Other possible implementation of the peripheral device includeshandwriting pad, touch pad or other device that can operate the cursertrail.

The first receiver video circuit 346 combines the first video data Vid1transmitted by the transmitter device 320, the second video data Vid2(such as the facial video data of the third user P3 captured by thecamera 366) and the first user operation data Ipt1 generated by themouse 367 operated by the third user (such as the mouse movement data)as a first combined video data Vid_C1. The first receiver video circuit346 outputs the first combined video data Vid_C1 to the first displaydevice 372 coupled to the first receiver device 340, and outputs thefirst combined video data Vid_C1 to the transmitter device 320 throughthe wireless transmission WL between the second wireless transmissionmodule 342 and the first wireless transmission module 328. Thetransmitter device 320 further outputs the first combined video dataVid_C1 to the second receiver device 350 through the Internettransmission LAN between the first network interface 329 and the secondnetwork interface 352.

Similarly, the second receiver device 350 includes a second networkinterface 352, a second receiver input interface 354 and a secondreceiver video circuit 356. The second receiver input interface 354 canbe implemented by a USB interface. As shown in FIG. 7, the USB interfaceused as the second receiver input interface 354 can be coupled to a USBinterface camera 368 with an in-built microphone to receive a thirdvideo data Vid3 including image and voice from the USB interface camera368. For example, when the camera 368 captures the image of the face ofthe fourth user P4, the captured third video data Vid3 is the facialvideo data of the fourth user P4. The third video data Vid3 includes thefacial image and the speech of the fourth user P4 during thepresentation process. The second receiver input interface 354 isoptionally coupled to the peripheral device (such as the mouse 369) toreceive a second user operation data Ipt2 of the fourth user P4 (such asthe mouse movement data inputted through the mouse 369 operated by theuser) received from the peripheral device.

The second receiver video circuit 356 combines the first video data Vid1transmitted from the transmitter device 320, the third video data Vid3(such as the facial video data of the fourth user P4 captured by thecamera 368) and the second user operation data Ipt2 generated throughthe mouse 369 operated by the fourth user P4 (such as the mouse movementdata) as a second combined video data Vid_C2. The second receiver videocircuit 356(1) outputs the second combined video data Vid_C2 to thesecond display device 374, and outputs the second combined video dataVid_C2 to the transmitter device 320 through the Internet transmissionLAN. The transmitter device 320 further outputs the second combinedvideo data Vid_C2 to the first receiver device 340 through the wirelesstransmission WL.

In the present embodiment, the information system 380 is exemplified bya notebook computer, but the information system 380 is not limitedthereto. In the present embodiment, the video output port 382 isexemplified by one of VGA output port, display port (DP),high-definition multimedia (HDMI) interface port and Type-C USBinterface port supporting video output function that are commonly seenin the market, but the embodiment is not limited thereto. The firstvideo data Vid1 is obtained by a notebook computer when processing auser input file data. The first video data Vid1 is shown on a displaymonitor of the notebook computer and outputted through the video outputport 382.

Referring to FIG. 8, a schematic diagram of the appearance of thereceiver device 350 of FIG. 7 according to the third embodiment of thepresent disclosure is shown. The second receiver device 350 has a videoport connection line 357, a second receiver input interface 354 and asecond network interface 352. The end of the video port connection line357 has a video signal line adaptor (such as one of VGA, display port,HDMI interface port and Type-C USB interface port) through which thevideo port connection line 357 can be mechanically combined with thevideo input port of the second display device 374. The receiver controlunit can output the second combined video data Vid_C2 to the video inputport of the second display device 374 through the video port connectionline 357. The appearance of the first receiver device 340 is similar tothe appearance of the second receiver device 350, and the maindifference lies in that the first receiver device 340 does not have thesecond network interface 352.

In the third embodiment, the first receiver video circuit 346 optionallyincludes a display processor and an audio processing circuit, whichrespectively perform the combining operation in the video part and thecombining operation in the audio part for the first combined video dataVid_C1. The display processor includes a scalar controller whose imagecombining circuit combines at least two of the video parts of the videopart of the first video data Vid1, the video part of the second videodata Vid2 and the video part of the first user operation data Ipt1inputted by the third user P as the video part of the first combinedvideo data Vid_C1. The audio processing circuit combines the audio partof the first video data Vid1 and the audio part of the second video dataVid2 as the audio part of the first combined video data Vid_C1. By thesame analogy, the second receiver video circuit 356 also optionallyincludes a display processor and an audio processing circuit, whichrespectively perform the combining operation in the video part and thecombining operation in the audio part for the second combined video dataVid_C2. The display processor includes the scalar controller whose imagecombining circuit combines at least two of the video parts of the videopart of the first video data Vid1, the video part of the third videodata Vid3 and the video part of the second user operation data Ipt2inputted by the fourth user P4 as the video part of the second combinedvideo data Vid_C2. The audio processing circuit combines the audio partof the first video data Vid1 and the audio part of the third video dataVid3 as the audio part of the second combined video data Vid_C2.

As shown in FIG. 7, the first receiver device 340 not only has the firstcombined video data Vid_C1 generated by the first receiver video circuit346, but also receives the second combined video data Vid_C2 generatedby the second receiver video circuit 356 through the wirelesstransmission WL and the Internet transmission LAN of the transmitterdevice 320. Therefore, the first receiver device 340 optionally outputsboth of the two combined frames to the first display device 372 by wayof split frames or picture-in-picture frame or the first receiver device340 optionally outputs one of the two combined frames to the firstdisplay device 372. Similarly, the second receiver device 350 not onlyhas the second combined video data Vid_C2 generated by the secondreceiver video circuit 356, but also receives the first combined videodata Vid_C1 generated by the first receiver video circuit 346 throughthe wireless transmission WL and the Internet transmission LAN of thetransmitter device 320. Therefore, the second receiver device 350optionally outputs both of the two combined frames to the second displaydevice 374 by way of split frames or picture-in-picture frame or thesecond receiver device 350 optionally outputs only one of the twocombined frames to the second display device 374.

Refer to FIG. 9, which shows an application scenario of according to thethird embodiment of the present disclosure. The scenarios of FIG. 9include (1) the first user P1 operates the information system 380 toread a presentation file to generate a first video data Vid1, themonitor of the information system 380 shows the first video data frameVid1′, and the information system 380 outputs the first video data Vid1to the transmitter device 320 through the video output port 382; (2) thefirst receiver input interface 344 of the first receiver device 340 isconnected to the camera 366 and the mouse 367, the third user P3operates the mouse 367 to input the mouse movement data, and the camera366 captures the image of the face of the third user P3 to obtain thesecond video data Vid2 which is the facial video data (including thefacial image and the presenter's speech) of the third user P3; and (3)the second receiver input interface 354 of the second receiver device350 is connected to the camera 368 and the mouse 369, the fourth user P4operates the mouse 369 to input the mouse movement data, and the camera368 captures the image of the face of the fourth user P4 to obtain athird video data Vid3 which is the facial video data of the fourth userP4. Under such scenarios, the first receiver video circuit 346 combinesthe first video data Vid1, the facial video data of the third user P3and the mouse movement data inputted by the third user P as a firstcombined video data Vid_C1. The first receiver video circuit 346 outputsthe first combined video data Vid_C1 to the first display device 372,and the first receiver video circuit 346 transmits the first combinedvideo data Vid_C1 to the second receiver device 350 through the wirelesstransmission WL and the Internet transmission LAN of the transmitterdevice 320. Similarly, the second receiver video circuit 356 combinesthe first video data Vid1, the facial video data of the fourth user P4and the mouse movement data inputted by the fourth user P4 as a secondcombined video data Vid_C2. The second receiver video circuit 356outputs the second combined video data Vid_C2 to the second displaydevice 374 at far end, and the second receiver video circuit 356transmits the second combined video data Vid_C2 to the first receiverdevice 340 through the wireless transmission WL and the Internettransmission LAN of the transmitter device 320.

Refer to FIG. 10A, which shows a schematic diagram of a display frameVid_C1′ of the second display device 374 when the second display device350 optionally outputs only the first combined video data Vid_C1 and thesecond display device 374 only shows the first combined video dataVid_C1. As shown in FIG. 10A, when the second display device 374 onlyshows the first combined video data Vid_C1, the display frame Vid_C1′ ofthe second display device 374 includes a first video data frame Vid1′, athird user facial video frame P3′ and a first mouse curser trail Ipt1′.Refer to FIG. 10B, which shows a schematic diagram of a display frameVid_C2′ of the second display device 374 when the first receiver device340 optionally outputs only the second combined video data Vid_C2 whichmakes the first display device 372 only shows the second combined videodata Vid_C2. As shown in FIG. 10B, when the first display device 372only shows the second combined video data Vid_C2, the display frameVid_C2′ of the first display device 372 includes a first video dataframe Vid1′, a fourth user facial video frame P4′ and a second mousecurser trail Ipt2′.

Refer to FIG. 11A, which shows a schematic diagram of apicture-in-picture frame of the second display device 374 when thesecond receiver device 350 optionally outputs both of the first combinedvideo data Vid_C1 and the second combined video data Vid_C2 and thesecond display device 374 shows both the first combined video dataVid_C1 and the second combined video data Vid_C2 by way ofpicture-in-picture frame. As shown in FIG. 11A, apart from the originalframe content of FIG. 10A, the second display device 374 additionallyshows a sub-frame whose content corresponds to the display frame Vid_C2′of the second combined video data Vid_C2 as shown in FIG. 10B.

Refer to FIG. 11B, which shows a picture-in-picture frame of the firstdisplay device 372 when the first receiver device 340 optionally outputsboth of the first combined video data Vid_C1 and the second combinedvideo data Vid_C2 and the first display device 372 shows the firstcombined video data Vid_C1 and the second combined video data Vid_C2 byway of picture-in-picture frame. As shown in FIG. 11B, apart from theoriginal frame content of FIG. 10B, the first display device 372additionally shows a sub-frame whose content corresponds to the displayframe Vid_C1′ of the first combined video data Vid_C1 as shown in FIG.10A.

As shown in FIG. 11A and FIG. 11B, through picture-in-picture frame,both the displayed frame of the first display device 372 at near end andthe displayed frame of the second display device 374 at far end at leastincludes a first video data frame Vid1′, a third user facial video frameP3′, a first mouse curser trail Ipt1′, a fourth user facial video frameP4′, and a second mouse curser trail Ipt2′. Thus, all conferenceparticipants at the near end conference room and the far end conferenceroom can real-timely understand that the third user P3 and the fourthuser P4 are discussing the presentation data, and can see the mousecurser trail inputted by the third user P3 and the fourth user P4respectively. In the future, those who view the recording of the videoconference can also understand that the third user P3 and the fourthuser P4 are discussing at that stage.

As disclosed in above embodiments, the video conference system forwireless presentation of the present disclosure combines the framecontent of the presentation file and the video data of the presenter'sface during the presentation process as a combined video data, andfurther outputs the combined video data to the receiver device at a farend conference room. The combined video data optionally includes thepresenter-marked image of the frame content of the presentation fileduring the presentation process, such as the mouse curser trail inputtedby the user. Thus, those who participate the video conference from a farend conference room through network can see the presenter's facialexpression and have a higher sense of participation. Additionally, whenthe recording of the entire video conference is viewed in the future,the viewers can clearly understand which presenter or questioner isspeaking at each stage, and the completeness of the conference recordcan be greatly increased.

While the invention has been described by way of example and in terms ofthe preferred embodiment(s), it is to be understood that the inventionis not limited thereto. On the contrary, it is intended to cover variousmodifications and similar arrangements and procedures, and the scope ofthe appended claims therefore should be accorded the broadestinterpretation so as to encompass all such modifications and similararrangements and procedures.

What is claimed is:
 1. A video conference system, comprising: atransmitter device, comprising: a transmitter control unit, coupled to avideo output port of an information system and configured to receive afirst video data from the video output port; a first network interface,configured to transmit the first video data; and a first wirelesstransmission module, configured to transmit the first video data; afirst receiver device, comprising: a second wireless transmissionmodule, configured to receive the first video data from the firstwireless transmission module; a first receiver input interface,configured to receive a second video data; and a first receiver videocircuit, coupled to a first display device; and a second receiverdevice, comprising: a second network interface, configured to receivethe first video data from the first network interface; and a secondreceiver video circuit, coupled to the second display device; whereinthe first receiver video circuit combines the first video data and thesecond video data as a first combined video data, the first receivervideo circuit transmits the first combined video data to the firstdisplay device, the first receiver video circuit outputs the firstcombined video data to the transmitter device through the first wirelesstransmission module and the second wireless transmission module, and thetransmitter device outputs the first combined video data to the secondreceiver device through the first network interface and the secondnetwork interface.
 2. The video conference system according to claim 1,wherein the second receiver device further comprises a second receiverinput interface, the second receiver input interface is configured toreceive a third video data, the second receiver video circuit combinesthe first video data and the third video data as a second combined videodata, the second receiver video circuit transmits the second combinedvideo data to the second display device, the second receiver videocircuit outputs the second combined video data to the transmitter devicethrough the first network interface and the second network interface,and the transmitter device outputs the second combined video data to thefirst receiver device through the first wireless transmission module andthe second wireless transmission module.
 3. The video conference systemaccording to claim 2, wherein the second receiver device optionallyoutputs both of the first combined video data and the second combinedvideo data to the second display device or the second receiver deviceoptionally outputs one of the first combined video data and the secondcombined video data to the second display device.
 4. The videoconference system according to claim 1, wherein the first receiver inputinterface is further coupled to a peripheral device and receive a firstuser operation data from the peripheral device, and the first receivervideo circuit combines the first video data, the second video data andthe first user operation data as the first combined video data.
 5. Thevideo conference system according to claim 4, wherein the peripheraldevice is selected from a group consisting of a mouse, a touch pad and ahandwriting pad, and the user operation data is a user presentationmarking data.
 6. The video conference system according to claim 1,wherein the video output port of the information system is ahigh-definition multimedia interface (HDMI) video port, and thetransmitter device further comprises an extended display identificationdata (EDID) code and provides the EDID code to the HDMI video port toperform reading; or, the video output port of the information system isa Type-C USB (Universal Serial Bus) connection port, and the transmitterdevice is coupled to the video output port of the information systemthrough a connection line supporting the Type-C USB alternative mode. 7.A video conference system, comprising: a transmitter device, comprising:a transmitter control unit, coupled to a video output port of aninformation system and configured to receive a first video data from thevideo output port; a first network interface, configured to transmit thefirst video data; and a first wireless transmission module, configuredto transmit the first video data; a first receiver device, comprising: asecond wireless transmission module, configured to receive the firstvideo data from the first wireless transmission module; and a firstreceiver video circuit, coupled to a first display device; and a secondreceiver device, comprising: a second network interface, configured toreceive the first video data from the first network interface; a secondreceiver input interface, configured to receive a third video data; anda second receiver video circuit, coupled to the second display device;wherein the second receiver video circuit combines the first video dataand the third video data as a second combined video data, the secondreceiver video circuit transmits the second combined video data to thesecond display device, the second receiver video circuit outputs thesecond combined video data to the transmitter device through the firstnetwork interface and the second network interface, and the transmitterdevice outputs the second combined video data to the first receiverdevice through the first wireless transmission module and the secondwireless transmission module.
 8. The video conference system accordingto claim 7, wherein the first receiver device further comprises a firstreceiver input interface configured to receive a second video data, thefirst receiver video circuit combines the first video data and thesecond video data as a first combined video data, the first receivervideo circuit transmits the first combined video data to the firstdisplay device, and the first receiver video circuit outputs the firstcombined video data to the transmitter device through the first wirelesstransmission module and the second wireless transmission module, and thetransmitter device outputs the first combined video data to the secondreceiver device through the first network interface and the secondnetwork interface.
 9. The video conference system according to claim 8,wherein the first receiver device optionally outputs both of the firstcombined video data and the second combined video data to the firstdisplay device or the first receiver device optionally outputs one ofthe first combined video data and the second combined video data to thefirst display device.
 10. The video conference system according to claim7, wherein the second receiver input interface is further coupled to aperipheral device and receive a second user operation data from theperipheral device, and the second receiver video circuit combines thefirst video data, the third video data and the second user operationdata as the second combined video data.
 11. The video conference systemaccording to claim 10, wherein the peripheral device is selected from agroup consisting of a mouse, a touch pad and a handwriting pad, and theuser operation data is a user presentation marking data.
 12. The videoconference system according to claim 7, wherein the video output port ofthe information system is a high-definition multimedia interface (HDMI)video port, and the transmitter device further comprises an extendeddisplay identification data (EDID) code and provides the EDID code tothe HDMI video port to perform reading; or, the video output port of theinformation system is a Type-C USB (Universal Serial Bus) connectionport, and the transmitter device is coupled to the video output port ofthe information system through a connection line supporting the Type-CUSB alternative mode.